Liquid crystal display apparatus and backlight module

ABSTRACT

Embodiments of the present invention relate to a display technical field and disclose a liquid crystal display apparatus and a backlight module thereof. The backlight module comprises: a backboard having a bottom plate and a plurality of side plates to form a light source receiving chamber; a plurality of light sources located in the light source receiving chamber and mounted on the bottom plate; an optical film located in the light source receiving chamber, edges of the optical film being mounted on the backboard; a plurality of supporting strips located at a side of the optical film facing toward the bottom plate and made of transparent elastic material, a surface of the supporting strips facing toward the optical film abutting against a surface of the optical film facing toward the bottom plate and two ends of the supporting strip being mounted on two opposing side plates of the backboard respectively. The backlight module is a direct type backlight module, and the supporting strips are in a line contact or surface contact with the optical film, thus stress concentration will not occur between the supporting strips and the optical film. In the above backlight module, the optical film is structurally stable while used as a diffusion element and may increase the display quality of the liquid crystal display apparatus.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Embodiments of the present invention relate to a field of displaytechnology, in particular, to a liquid crystal display apparatus and abacklight module thereof.

2. Description of the Related Art

A liquid crystal display apparatus has been widely used in a field suchas display technology or the like and is dominating in various displayapparatus due to its characteristics such as light weight, thinthickness, low power consumption, less radiation, etc.

Since a liquid crystal panel of the liquid crystal display apparatusdoes not emit light by itself, it is required to provide a backlightmodule in the liquid crystal display apparatus to provide a light sourcefor the liquid crystal panel. At present, a high brightness backlightmodule typically employs a direct type backlight in which a diffusionplate is generally used as an optical diffusion structure and asupporting structure for an optical film. However, an additionalsupporting structure is required to be provided to support the diffusionplate due to its heavy weight, causing a contour of the additionalsupporting structure to be presented on a picture around the additionalsupporting structure when the display apparatus is displaying thepicture.

Thus there is a tend to replace the diffusion plate with an optical filmin the development of the display technology. However, the optical filmhas a low mechanical strength itself and there is a large limitationwhen choosing a supporting structure for the optical film.

Therefore, one of problems to be solved by those skilled in the art ishow to provide a backlight module, which has a stable structure and isable to ensure the display quality of the liquid crystal displayapparatus when an optical film is used as an optical diffusion structuretherein, and a liquid crystal display apparatus including the backlightmodule.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a liquid crystal displayapparatus and a backlight module thereof. In the backlight module, theoptical film is used as a diffusion element and the backlight module isstable in structure and may improve the display quality of the liquidcrystal display apparatus.

In order to achieve the above purposes, embodiments of the presentinvention provide a backlight module comprising:

a backboard having a bottom plate and a plurality of side plates, thebottom plate and the plurality of side plates forming a light sourcereceiving chamber;

a plurality of light sources located in the light source receivingchamber and mounted on the bottom plate;

an optical film located in the light source receiving chamber, theoptical film being mounted on the backboard; and

a plurality of supporting strips located on a side of the optical filmfacing toward the bottom plate and made of transparent elastic material,a surface of the supporting strip facing toward the optical filmabutting against a surface of the optical film facing toward the bottomplate and two ends of the supporting strip being mounted on two opposingside plates of the backboard respectively.

The above backlight module is a direct type backlight module. The edgesof the optical film are mounted on the backboard and the middle portionthereof is supported by the plurality of supporting strips. Thesupporting strip is made of transparent elastic material, thus it has alittle influence on the uniformity of light in the backlight module; thesupporting strip is flexible, and the supporting strips are in a linecontact or surface contact with the optical film when the optical filmis supported by the plurality of supporting strips, thus stressconcentration will not occur between the supporting strips and theoptical film; further, when the optical film is supported by theplurality of supporting strips having a certain flexibility, a forcebetween the supporting strips and the optical film can be buffered, sothat the structural stability of the backlight module may be improved.Thus, with the above backlight module in which an optical film is usedas a diffusion element, the structure of the backlight module is stableand the display quality of the liquid crystal display apparatus can beimproved.

According to an embodiment, the plurality of supporting strips comprisea plurality of first supporting strips in parallel with each other and aplurality of second supporting strips in parallel with each other, andthe first supporting strips and the second supporting strips cross witheach other.

According to an embodiment, opposing side plates of the backboard areprovided with a pair of through holes corresponding to each of thesupporting strips, each of the supporting strips extending through acorresponding pair of through holes.

According to an embodiment, each of two ends of the supporting strip isfixed on a surface of the side plate of the backboard facing away fromthe light source receiving chamber.

According to an embodiment, two ends of the supporting strip areprovided with fixing hole respectively, and the surfaces of the opposingside plates of the backboard facing away from the light source receivingchamber are provided with fixing studs, which correspond to the fixingholes in the supporting strip and are connected with the fixing holes inthe supporting strip in a plug-in fit manner, respectively.

According to an embodiment, the two ends of each of the supportingstrips are provided with fixing holes respectively and the two ends ofeach of the supporting strips are mounted on opposing side plates of thebackboard via fastening screws or rivets, respectively.

According to an embodiment, two ends of each of the supporting stripsare connected with opposing side plates of the backboard throughsnapping engagement members.

According to an embodiment, the optical film are mounted on the sideplates of the backboard at edges of the optical film.

According to an embodiment, the optical film is provided with aplurality of fixing holes at its edges, and the side plates of thebackboard are provided with fixing studs corresponding to the fixingholes in the optical film respectively, and each fixing hole and itscorresponding fixing stud are connected with each other in a plug-in fitmanner.

According to an embodiment, the optical film is connected with the sideplates through a frame provided at the edges of the optical film.

According to an embodiment, the optical film is provided with aplurality of fixing holes at its edges, and the frame is provided withfixing studs corresponding to the fixing holes in the optical filmrespectively, and each fixing hole and its corresponding fixing stud areconnected with each other in a plug-in fit manner; and the frame isprovided with slots for engaging with the side plates of the backboard.

According to an embodiment, the frame is formed with a supportingsurface for supporting a display panel.

According to an embodiment, the supporting strip is removably mounted ontwo opposing side plates of the backboard, so as to be removed fromoutside of the backlight module.

Other Embodiments of the present invention also provides a liquidcrystal display apparatus comprising a backlight module according to anyof above embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural view of a backlight module according toan embodiment of the present invention;

FIG. 2 is a schematic structural view showing a cross section of thebacklight module taken along line A-A in FIG. 1; and

FIG. 3 is a schematic structural view showing a cross section of abacklight module according to another embodiment of the presentinvention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION

Hereafter, the technical solutions in the embodiments of the presentinvention will be clearly and completely described with reference to theaccompanying drawings in the embodiments of the present invention.Apparently, the described embodiments are merely a part rather than allof the embodiments of the present invention. All other embodimentsobtained by those skilled in the art based on the embodiments of thepresent invention without creative efforts shall fall within theprotection scope of the present invention.

Referring to FIGS. 1 and 2, a backlight module according to anembodiment of the present invention comprises: a backboard 1 having abottom plate 12 and a plurality of side plates 11 to form a light sourcereceiving chamber; a plurality of light sources 13 located in the lightsource receiving chamber and mounted on the bottom plate 12; an opticalfilm 3 located in the light source receiving chamber, edges of theoptical film 3 being mounted on the backboard 1; a plurality ofsupporting strips 2 located on a side of the optical film 3 facingtoward the bottom plate 12 and made of transparent elastic material. Asurface of each of the supporting strips 2 facing toward the opticalfilm 3 abuts against a surface of the optical film 3 facing toward thebottom plate 12 and two ends of each of the supporting strips 2 aremounted on two opposing side plates 11 of the backboard 1.

As shown in FIGS. 1 and 2, the backlight module is a direct typebacklight module. The edges of the optical film 3 are mounted on thebackboard 1 and the middle portion thereof is supported by the pluralityof supporting strips 2. The supporting strip 2 is made of transparentelastic material, thus it has a little influence on the uniformity oflight in the backlight module; the supporting strip 2 is flexible, andthe supporting strips 2 are in a line contact or surface contact withthe optical film 3 when the optical film 3 is supported by the pluralityof supporting strips 2, thus stress concentration will not occur betweenthe supporting strips 2 and the optical film 3, further, when theoptical film 3 is supported by the plurality of supporting strips 2having a certain flexibility, a force between the supporting strips 2and the optical film 3 can be buffered, so that the structural stabilityof the backlight module may be improved. Thus, in the above backlightmodule in which the optical film is used as a diffusion element, thestructure of the backlight module is stable and the display quality ofthe liquid crystal display apparatus can be improved.

In an embodiment, as shown in FIG. 1, the plurality of supporting strips2 comprise a plurality of first supporting strips 21 in parallel witheach other and a plurality of second supporting strips 22 in parallelwith each other. The first supporting strips 21 and the secondsupporting strips 22 cross with each other. The crossed first supportingstrips 21 and second supporting strips 22 may form a gridded supportingstructure on an inner side of the side plates 11 of the backboard 1facing toward the light source receiving chamber, so that the opticalfilm 3 can be well supported.

In another embodiment, as shown in FIG. 2, in the backlight module,multiple paired through holes corresponding to the supporting strips 2respectively are provided in the side plates 11 of the backboard 1, andeach of the supporting strips 2 extends through a corresponding pair ofthrough holes.

In an further embodiment, each of two ends of the supporting strip 2 arefixed on a surface of the side plate 11 of the backboard 1 facing awayfrom the light source receiving chamber, respectively. Thereby, when theliquid crystal panel of the liquid crystal display apparatus is hung ina vertical direction, the optical film 3 is also hung in the verticaldirection. In that case, the optical film 3 may less rely on thesupporting strip 2 and the connection requirement will be met onlythrough the connection between the optical film 3 and the side plates 11of the backboard 1. Thus, the connection between two ends of each of thesupporting strips 2 and the side plates 11 may be removed or releasedand then each of the supporting strips 2 may be withdrawn from thebackboard 1 through the through holes in the side plates 11 of thebackboard 1, so that the influence of the supporting strip 2 on theuniformity of light in the backlight module may be further decreased andthus the display quality of the liquid crystal display apparatus may befurther improved.

Specifically, the connection between the supporting strip 2 and the sideplate 11 may be selected from several manners as follows.

As a first manner, as shown in FIG. 2, two ends of each of thesupporting strips 2 are provided with fixing holes respectively, and theside plates 11 of the backboard 1 are provided with fixing studs 111which correspond to and are connected with the fixing holes in thesupporting strips 2 in a plug-in fit manner, respectively.

AS a second manner: two ends of each of the supporting strips 2 areprovided with fixing holes respectively and mounted on the side plates11 of the backboard 1 via fastening screws or rivets.

As a third manner: two ends of each of the supporting strips 2 areconnected with the side plates 11 of the backboard 1 through snappingengagement members.

Apparently, there are other manners for connecting the supporting strip2 and the side plate 11, which are omitted here.

In an embodiment, edges of the optical film 3 may be mounted on the sideplates of the backboard 1.

Specifically, in an example, as shown in FIG. 2, the optical film 3 isprovided with a plurality of fixing holes at its edges, and the sideplates 11 of the backboard 1 are provided with fixing studs 112 whichcorrespond to and are connected with the fixing holes in the opticalfilm 3 in a plug-in fit manner, respectively.

In another example, as shown in FIG. 3, the optical film 3 is providedwith a frame 4 at its edges and the optical film 3 is connected with theside plates through the frame 4.

Specifically, the optical film 3 is provided with a plurality of fixingholes at its edges, and the frame 4 is provided with fixing studs 112 awhich correspond to the fixing holes in the optical film 3 respectively.Each fixing hole and its corresponding fixing stud are connected witheach other in a plug-in fit manner, and the frame 4 is provided withslots 41 for engaging with the side plates 11 of the backboard 1, so asto connect the optical film 3 with the side plates 11 through the frame4.

Specifically, a supporting surface for supporting a display panel 5 maybe formed on the frame 4, so as to support the display panel 5.

Further, an embodiment of the present invention provides a liquidcrystal display apparatus comprising a backlight module according to anyof the above embodiments. The liquid crystal display apparatus has alight weight and a high display quality.

Obviously, various modifications and changes may be made to theembodiments of the present invention by those skilled in the art withoutdeparting from the spirit and scope of the present invention. Thus,these modifications and changes are intended to be included in thepresent invention if they fall into the claims of the present inventionand the equivalent technology thereof.

1. A backlight module comprising: a backboard having a bottom plate anda plurality of side plates, the bottom plate and the plurality of sideplates being configured to form a light source receiving chamber; aplurality of light sources located in the light source receiving chamberand mounted on the bottom plate; an optical film located in the lightsource receiving chamber, the optical film being mounted to thebackboard; and a plurality of supporting strips located on a side of theoptical film facing toward the bottom plate and made of transparentelastic material, a surface of the supporting strip facing toward theoptical film abutting against a surface of the optical film facingtoward the bottom plate and two ends of the supporting strip beingmounted on two opposing side plates of the backboard respectively. 2.The backlight module according to claim 1, wherein the plurality ofsupporting strips comprise a plurality of first supporting strips inparallel with each other and a plurality of second supporting strips inparallel with each other, and the first supporting strips and the secondsupporting strips cross with each other.
 3. The backlight moduleaccording to claim 1, wherein opposing side plates of the backboard areprovided with a pair of through holes corresponding to each of thesupporting strips, each of the supporting strips extending through acorresponding pair of through holes.
 4. The backlight module accordingto claim 3, wherein each of the two ends of the supporting strip isfixed on a surface of the side plate of the backboard facing away fromthe light source receiving chamber.
 5. The backlight module according toclaim 3, wherein the two ends of each supporting strip are provided withfixing holes respectively, and the surfaces of the opposing side platesof the backboard facing away from the light source receiving chamber areprovided with fixing studs, which correspond to the fixing holes in thesupporting strip and are connected with the fixing holes in thesupporting strip in a plug-in fit manner, respectively.
 6. The backlightmodule according to claim 3, wherein the two ends of each supportingstrip are provided with fixing holes respectively and mounted on theopposing side plates of the backboard via fastening screws or rivets,respectively.
 7. The backlight module according to claim 3, wherein thetwo ends of each supporting strip are connected with the opposing sideplates of the backboard through snapping engagement members.
 8. Thebacklight module according to claim 1, wherein the optical film ismounted on the side plates of the backboard at edges of the opticalfilm.
 9. The backlight module according to claim 8, wherein the opticalfilm is provided with a plurality of fixing holes at its edges, and theside plates of the backboard are provided with fixing studscorresponding to the fixing holes in the optical film respectively, andeach fixing hole and its corresponding fixing stud are connected witheach other in a plug-in fit manner.
 10. The backlight module accordingto claim 8, wherein the optical film is connected with the side platesthrough a frame provided at the edges of the optical film.
 11. Thebacklight module according to claim 10, wherein the optical film isprovided with a plurality of fixing holes at its edges, and the frame isprovided with fixing studs corresponding to the fixing holes in theoptical film respectively, and each fixing hole and its correspondingfixing stud are connected with each other in a plug-in fit manner; andthe frame is provided with slots for engaging with the side plates ofthe backboard.
 12. The backlight module according to claim 11, whereinthe frame is formed with a supporting surface for supporting a displaypanel.
 13. The backlight module according to claim 1, wherein thesupporting strip is removably mounted on the two opposing side plates ofthe backboard, so as to be withdrawn from outside of the backlightmodule.
 14. A liquid crystal display apparatus comprising the backlightmodule according to claim
 1. 15. A liquid crystal display apparatuscomprising a backlight module according to claim
 2. 16. A liquid crystaldisplay apparatus comprising the backlight module according to claim 3.17. A liquid crystal display apparatus comprising the backlight moduleaccording to claim
 4. 18. A liquid crystal display apparatus comprisingthe backlight module according to claim
 5. 19. A liquid crystal displayapparatus comprising the backlight module according to claim
 6. 20. Aliquid crystal display apparatus comprising the backlight moduleaccording to claim 7.